Patent SG-11201909741U-A (SG)
Title: Radio link recovery for user equipment
Inventor: NAIR SURESH
IPC: H04W76/19
Filed: 2018-03-29
Abstract: USER EQUIPIANT (OE) 103 104 EVOLVED NODE B (SOURCE eNB) EVOLVED NODE B (TARGET MB) 114 108 1110 MOBILITY SERVING PACKET DATA 106 MANAGEENT ENTITY (MME) GATEWAY (SGIY) NETWORK GATEWAY (KW) W O 20 18/ 194809 Al 112 (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 25 October 2018 (25.10.2018) WIP0 I PCT ill IIIIIl °mons °nolo VIII molionoiflo oimIE (10) International Publication Number WO 2018/194809 Al (51) International Patent Classification: H04W 12/08 (2009.01) HO4W 76/19 (2018.01) (21) International Application Number: PCT/US2018/025006 (22) International Filing Date: 29 March 2018 (29.03.2018) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/488,179 21 April 2017 (21.04.2017) US 15/700,940 11 September 2017 (11.09.2017) US (71) Applicant: NOKIA OF AMERICA CORPORATION [US/US]; 600-700 Mountain Avenue, Murray Hill, NJ 07974 (US). (72) Inventor: NAIR, Suresh; 600-700 Mountain Avenue, Murray Hill, NJ 07974-0636 (US). (74) Agent: RYAN, Joseph, B.; Ryan, Mason & Lewis, LLP, 48 South Service Road, Suite 100, Melville, NY 11747 (US). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Published: — with international search report (Art. 21(3)) (54) Title: RADIO LINK RECOVERY FOR USER EQUIPMENT FIG. 1A 102H USER EQUIPMENT (UE) EVOLVED NODE B (eNB) r 108 r 110 112 MOBILITY SERVING PACKET DATA 106H MANAGEMENT DIM? GATEWAY NETWORK GATEWAY INTERNET (MME) (SGIY) (KW) (57) : in response to a radio link failure between giv- en user equipment and a source access node of a communication system during a data transfer operation over a control plane, a method is provided for recovering the radio link for the given user equipment through a target access node of the communication sys- tem. The radio link recovery is enabled via a mobility manage- ment node of the communication system using a non-access stra- tum security context previously established between the given user equipment and the mobility management node. FIG. 1B